L.D. Landau, or Lev Davidovich Landau, was a prominent Soviet physicist born on March 22, 1908, in Baku, Azerbaijan. He made significant contributions to various fields of physics, including quantum mechanics, condensed matter physics, and superfluidity. Landau was awarded the Nobel Prize in Physics in 1962 for his work on the theory of superfluid helium. Landau was also known for his role in developing the Landau-Lifshitz series, a comprehensive set of textbooks that cover many areas of theoretical physics. He was a key figure in the Moscow School of Physics and influenced many future physicists through his teaching and research. Landau passed away on April 1, 1968.